Angle-sawing mechanism.



No. 822,291. PATENTED JUNE 5 1906.

P. A. MILLET 3; A. M. POWELL.

ANGLE SAWING MECHANISM.

APPLICATION rum) APR.13. 1905.

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PATENTED JUNE 5, 1906. P. A. MILLET & A. M. POWELL. ANGLE SAWINGMECHANISM.

APPLICATION FILED APR.13. 1905.

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UNITED srnwgrnnr ()FFIGE'.Q

PHILLIP A. MILLET AND ALBERT M. POWELL, OF WORCESTER,

MASSACHUSETTS.

ANGLE-SAWING MECHANISM.

Specification of Letters Patent.

latente d June 5, 1906.

To all whom it may concern:

Be it known that we, PHILLIP A. MILLET and ALBERT M. POWELL, citizens ofthe United States, residing at Worcester, in the county of Worcester andState of Massachusetts, have invented a new and useful Angle- SawingMechanism, of which the following, together with the accompanyingdrawings, is a specification sufiiciently full, clear, and exact toenable persons skilled in the art to which this invention appertains tomake and use the same.

The prime object of this invention is to provide an efficient andpractically convenient mechanism for the use of carpenters orwoodworkers in the sawing of bevels, angles, and other various cutsrequired in the fitting of lumber and joinery, said mechanism adaptedfor having a more extended range of application than the ordinarymiter-box.

Another object is to provide an instrument of the class specifiedcomprising an attachable work-squaring back plate carrying an adjustableoverhead saw supporting bar seated thereon and provided with interlippedsaw-guiding devices and means for effecting and securing adjustments ofthe mechanisms, the various parts being constructed and combined in themanner hereinafter more fully explained.

Minor objects and features of our invention are set forth in thefollowing detailed description, the particular subject-matter claimedbeing hereinafter definitely specified.

In the accompanying drawings, Figure 1 represents a front elevation, andFig. 2 a top plan view, of mechanism embodying our invention. Fig. 3represents a vertical cen tral section of one of the saw-guides. Fig. 4represents a back view, and Fig. 5 a side view, in elevation; and Fig. 6is a fragmentary sectional view showing the means and manner ofretaining the saw elevated.

Referring to the drawings, the numeral 3 indicates an uprightstraightfaced worksquaring back plate provided with suitablesupporting-feet 4, having openings therein for the accommodation ofordinary screws, whereby the instrument can be attached to a bench,plank, or timber B as an improvised base at any position of use. At theupper part of the plate 3, near one end, it is provided with arearwardly-projecting top seat portion or shelf 33, and seated thereonand pivoted by an axis, stud, or bolt 5 there is an overhanging swingingbar or carrier 6, having at one side a segment-plate 7, integrally fixedthereon in plane with the bar concentric with the pivot. Said bar,which-may be single or extendible, is provided at its respective endswith upright heads or guideway members 8 and 9, formed rectangular andopen at one side and provided with undercut or lipped and grooved edgesat either side of the upright inner space, in which the sawguides 10 and12 are fitted by interlipped countermatching edges, as shown; Thisinterlipped engagement keeps the saw-guides firm laterally, while theyare slidably supported to move up and down freely. The sawguides andguideway members 8' and 9 are offset laterally from the bar 6, so thatthe line of the saw S passes clear and beyond the end of the back plate,which extends beyond the pivot center and terminates near thesawing-line, as indicated on Fig. 2. The pivot 5 is fitted in aprojection or boss 11 at the upper rear part of the plate, upon the topof which thebar is mounted to swing to the right and left and adjust tothe various required angles in relation to the back plate.- Said pivotis preferably made longenough to engage and center in lower hingingears,

which connect the back plate and rear guideway member, as shown at 13but such lower hinge may not in all cases be required.

The edge of the overhanging segment-plate 7 is provided with notches nto correspond with the principal angular cuts employed, and alatch-lever 15 is arranged at the back of the plate 3, pivotallyattached thereto at 14- and projecting up through a slot 16 in theoffset portion at the top of the, back plate in a manner to engage anyone of the notches in the segment 7, the upper end of said lever beingsuitably curved or formed for its convenient operation by the hand. Aspring 17 is combined with the lever 15 for pressing it toward thenotched segment A clamping-piece 19 is mounted on the shelf 33 andprovided with a bolt and thumbnut 20. The end of said clamping-pieceprojects over the rim of the segment, and by turning down the thumb-nutthe segment can be firmly clamped and secured for holding thesaw-supporting bar at any adjusted position either while the latch-leveris in a notch n or when the notches are out of alinement with thelatch-lever. The handle end of the lever and the clamp device being atthe top of the back plate, are always conveniently accessible foroperation.

The saw-guides are each fitted with a sl1t or opening 21 for receivingand directing the saw, as indicated, and are arranged to move freely upand down in the guideways on the overhead supporting bar. Combined withthe saw-guides there is a means for gaglng the extent of downwardmovement and arresting the saw-guide at any required limit. Such meansconsists of a gage-rod 23, having sliding support at 24 in the guidewaymember and provided with a lug or hook 25, that engages with thesaw-guide, (see Fig. 3,) and a set-screw 26 serves for holding the rodas adjusted.

The saw-guide is preferably provided with a side bearing-finger 27,working through an upright slot or opening 28 in the side of the guideand provided with a hinging joint 29, whereby the finger is flexiblyconnected with the body of the guide. A set-screw 30 is arranged in theupwardly-extending arm of the finger-lever, whereby said bearing-fingercan be regulated for adjusting the available width of the saw-slit 21 toaccommodate saws of different thickness.

The overhanging saw-supporting bar is provided with an extension arm ormember 66, carrying the forward saw-guiding head. Said arm is bestsupported and guided in a groove on the main part of the bar andprovided with a slot and set-screw 32. The sawsupporting bar can thus beextended or contracted, as desired. This feature of extension affordsfacility for working upon wider stock when the saw is swung around to aconsiderable angle than could otherwise be done, while the overheadposition and hanging of the bar permits wide stock to be entered beneaththe saw from the front.

A flat spring 35 is shown attached to the arm by a pivot-screw 36. Saidspring is made of suitable shape to engage the reinforce-back t of thesaw S, as in Fig. 6, when the saw is raised out of the work for holding'it elevated. To release the hold on the saw, the top of the spring ismerely pressed back, disengaging its lug or bend 37 from beneath thesaw-back t. When not in use, this spring may be turned down alongsidethe bar, as indicated by dotted lines 53 on Fig. 5.

For small miter-box work we provide a bedboard 39, (see Fig. 5,) havingsuitable earpieces for embracing the feet 4, which bedboard is placedupon the bench or timber B as a seat for the work at the position shown.

By arranging the saw-supporting bar and suspendinguides as describedwith a clear open space or the work below and with no obstruction at thefront the mechanism can be used for working on pieces of comparativelylarge dimension. The general con struction of the mechanism is such thatit enables the instrument to be used by screwing it to any convenientsupport for cutting tenons, inclines, and bevels on timbers, rafters,&c., as Well as for ordinary mitering-work.

We claim as our invention- 1. Amechanism of the character described,comprising the pivoted overhanging swinging supporting-bar, havinglaterally-offset guideway-heads with slidable saw-guiding devicesthereon adjustable in relation to said bar at its front and rear endsfor suspending a saw, and the single back plate disposed wholly at oneside of the line of the saw, and extending underneath the supporting-barbeyond the pivot center, and terminating near the sawing-line, attachingmembers adapted for sustaining said back plate upright upon animprovised base, and devices for retaining the swinging bar at angularpositions in relation to said back plate.

2. In an angle-sawing mechanism, a workguiding plate, the overhangingpivoted sawsupporting bar having the upright guidewayheads laterallyoifset from the central line of said bar, and formed open at the sidewith undercut or lipped grooves, the slitted sawguides having flangededges movable in said guideway-heads, and means substantially asdescribed for retaining said bar at positions of radial adjustment. 7

3. In an angle-sawing mechanism, the combination as described, with anattachable work-guiding plate; of the overhanging centrally-pivotedsaw-supporting bar having a segment integral thereon, andlaterally-oflset grooved guideway members with open side faces, theoffset flanged saw-guides slidable therein, an extendible connection forone of said guidewa members, means for securing the extendibleconnection to the main part of the bar, and means for securing said barat the positions of its lateral adjustment.

4.. An angle-sawing mechanism, comprising the rectangular upright backplate forming the work-squaring face and provided at its top edge with aseat at right angle with the face, for the bar and its segment, andhaving at its bottom edge the right-angled supporting-feet adapted fortemporary attachment to an improvised base such as a bench, plank ortimber; the upright pivot member at one end of said plate in rear of itsface, the pivoted laterally-swinging saw-supporting bar having theintegrally-formed segment in plane with said bar, mounted upon said topseat on the back plate, vertically grooved guidewayheads carried on saidbar, with laterally-offset saw-guides independently movable therein atits front and rear ends, and means for securing the segment, bar andguideway-heads at adjusted positions, all substantially as and for thepurposes set forth.

5. In an angle-sawing mechanism, the combination as described, of thesingle back plate having a top rearward projection-near one end forminga seat for the bar, the laterallyswingingsaW-supportingbarhavinganotohed segment integral therewith, said saw-supporting barand segment seated upon the top of the back plate, a center pivotconnecting said bar and plate, the spring-pressed latchlever fulcrumedon the back of the plate and extending up through a slot in the topprojection to engage with the notches of said segment, the clamp-pieceprojecting over the rim of the segment, and a thumb-screw for tighteningand loosening said segment upon its seat, substantially as set forth.

6. In a mechanism of the character described, the combination With theslitted sawguide 10, provided with the vertical groove or openingbearing-finger 27 arranged through said opening With its inner faceadjacent to the sawguiding slit, a hinging joint flexibly connectingsaid finger to the saw-guide, and a setscreW arranged in an extendedportion of said finger for regulating the position of the finger inrelation to the saw-slit, substantially as and for the purpose setforth.

Witness our hands this 10th day of April, 1905.

PHILLIP A. MILLET. ALBERT M. POWELL.

Witnesses:

CHAs. H. BURLEIGH, CHARLES S. BACON.

28 in its side; of the adjusting side

